Title:
MULTIPLEXER
Document Type and Number:
WIPO Patent Application WO/2020/013157
Kind Code:
A1
Abstract:
This multiplexer (10) comprises: an antenna terminal (T1); an inductance element (L11); and a transmission side filter (20) and a receiving side filter (30) that are connected to the antenna terminal (T1). The transmission side filter (20) has a first passband, and the receiving side filter (30) has a second passband. The receiving side filter (30) is connected to the antenna terminal (T1) with the inductance element (L11) interposed. The center frequency of the second passband is set higher than the center frequency of the first passband. The receiving side filter (30) comprises a plurality of parallel arm resonance units (P11 to P14) including the parallel arm resonance unit (P11) that is connected nearest to the inductance element (L11). The electrostatic capacity of the parallel arm resonance unit (P11) is greater than the electrostatic capacity of any of the other parallel arm resonance units (P12 to P14).
Inventors:
TAKATA TOSHIAKI (JP)
Application Number:
PCT/JP2019/027074
Publication Date:
January 16, 2020
Filing Date:
July 09, 2019
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/72; H03H9/70
Domestic Patent References:
| WO2004112246A1 | 2004-12-23 | |||
| WO2019017422A1 | 2019-01-24 |
Foreign References:
| JP2017204744A | 2017-11-16 | |||
| JPH1155067A | 1999-02-26 | |||
| JP2012151697A | 2012-08-09 | |||
| JPH05167388A | 1993-07-02 | |||
| JP2008160562A | 2008-07-10 | |||
| JP2019022164A | 2019-02-07 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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